Gate-valve mechanism.



D. F. O'BRIEN.

GATE VALVE MECHANISM.

APPLICATION man JULY 10, 1911.

Patented May 2, 1916.

2 SHEETS-SHEET I.

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LUMBXA PMNOGRAPH can. WASHINGTON n c D. F. OBRIEN.

GATE VALVE MECHANISM.

APPLICATION FILED JULY 10, 1911. 1 181 157, Patented May 2, 1916.

2 SHEETS-SHEET 2.

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DENIS F. OIBRIEN, OF NEWARK, NEW JERSEY.

GATE-VALVE MECHANISM.

To all whom it may concern:

Be it known that I, DENIS F. OBRIEN, a citizen of the United States,residing at Newark, county of Essex, and State of New Jersey, haveinvented certain new and userul Improvements in Gate-Valve Mechanism,fully described and represented in the following specification and theaccompanying drawings, forming a part of the same.

This invention relates to improvements had from a detailed descriptionof an organization embodying the same, such description will now begiven in connection with the accompanying drawings in which- Figure 1 isa vertical elevation of a gate valve mechanism and casing thereforequipped with the present invention. Fig.

2 is a partial vertical section on the line 2 of Fig. 1. Fig. 3 is ahorizontal section on the line 3 of Fig. 1. Fig. 4 is a horizontalsection on the line 4 of Fig. 1; and Figs. 5, 6 and 7 are detailsillustrating part of the valve operating mechanism.

Referring to said drawings, the valve casing therein illustrated is madein two parts or castings 1, 2, bolted together, as shown, so as toprovide at its lower end a valve chamber 3, provided with an inlet 4 andan outlet 5, communication between which is cut off when the valve is inthe position shown in Fig. 1, and an upperchamber 6 in which is mountedan endwise movable spindle 7, which, when rotated, willraise the gatevalve more or less from the valve chamber 3 and into the chamber 6, andthus open communication between the inlet and outlet 4, 5. The inletandvoutlet 4c, 5 have screwed into their inner ends flanged rings 8, 9providing seats for the valve disks 10, 11, which are provided on theirfaces adjacent to the valve seats 8, 9 with annular recesses in whichare secured annular gaskets of some soft metal or other suitableSpecification of Letters Patent.

Application filed July 10, 1911.

Serial No. 637,632.

tween the valves and their seats. The spindle 7 is mounted in the uppermember or casting 2, and in a stufling boX 12, bolted to the upper endthereof, the upper squared end of the spindle projecting from stufiingbox 12 into convenient position for the reception of a wrench, by whichthe spindle may be turned. Endwise movement of the spindle is preventedby the provision of a collar 13 thereon fitting in a correspondinglyshaped recess provided in the upper end of the casting 2, and the lowerend of the stu1fing box 12; this recess being suitably packed to preventleakage around the spindle. At its lower end there is threaded on thespindle 7 a nut 14 which constitutes the carrier for the valve disks 10,11, and which in order to act as such is provided with two diametricallyopposite pairs of lugs 15, 16 and 1.7, 18, which are, in turn, providedwith lateral Patented May a, 1916.

projections 15 16 and 17 18, two of which, 16 18*, enter correspondingopenings in ears 19, 20, extending upwardly from and integral with valvedisk 10, and the other two of which, 15 17, enter corresponding openingsin like ears 21, 22, projecting upwardly from and integral with valvedisk 11. As the spindle is rotated, nut '14:, and, therefore, valvedisks 10, 11 carried thereby, are caused to travel edgewise upwardly ordownwardly, thereon, as the case may be, to open or close communicationbetween the inlet and outlet 4;, 5; r0- tation of said nut, and,therefore, of said valves, being prevented by the valve seats 8, 9, andalso by guiding ribs 23, projecting inwardly toward each other inchamber 6 in position to engage the outer faces of the valve disks 10,11.

From the foregoing it will be understood that as the spindle 7 isrotated in one direction, nut 11 will be caused to travel upwardly onsaid spindle, and, through the connections just described between thesaid nut and the valve disks 10, 11, move said valve disks upwardly fromthe position in 1 necessary to provide notonly some valve opacross theirvalve seats, but also, in orderto secure proper closure of the valves,to,

provide valve closing or controlling mechanism, which, after the valvedisks have been.

thus moved edgewise bodily into alinement with their valve seats, willmove the valves endwise or toward their seats and hold them inv thatposition against the pressure of the water or other influencestending toopen them, and it is necessary also that such additional valve operatingmechanism should be so constructed that the valve disks. will be;released thereby so that they may be readily moved bodily: edgewise bythe spindle asjust described across the faces of their valve seats.

It is: the: object of the present invention to provide valve controllingmechanism of this kind which will. be more certain and reliable itsoperations than valve mechanisms heretofore devised; and such valvecontrolling mechanism, constituting part of the present invention, willnow be described.

This valve controlling mechanism consists of a pair of arms 24-, 25,pivotally mounted on two pins 26 driven, through the lugs:15-,,l6 and17, 18, projecting from the nut 14 so that as said nut is moved upwardlyand; downwardly, these arms 24, 25 will be moved therewith. These arms.are provided q with/toes 27 coacting with vertically inclinedprojections 27* formed on the inner walls of valve chamber 8 in: thepath of vertical movement of the arms 24, 25, and which tend to engageand force said arms inwardly toward each. other as they move downward.At their lower ends, and approximately in line with their pivotalpoints, each of, the arms 24,. 25 is provided on. opposite sides; withinclined members 28 each coacting with a pair of' correspondinglyinclined projections 29 formed on the inner faces of the valve disks;10, 11, the two pairs of said projections 29 being arranged in linewith, but on. opposite sides of, the center of the valve disks 10, 11.The inclination on. the surface of each of the members 28 is in twodirections, that is to say, horizontally outward. from the inner edgeand also upwardly from its lower edge. as best shown in Figs.v 5, 6 and7, and the inclinations on each of the inclined projections 29corresponds to. that of the inclined member 28 which engages it. Theinclinations on each of the members 28 are so formed with relation tothe pivotal point, and therefore the swinging movement, of the arm 24 or25, that in whatever position such arm may assume when swung inwardly byengagement of toe 27 by projection 27 such inclined member 28 willalwavs have a broad bearing engagement with its correree ies r e l-iesi. n i i. seeme em:

jections 29 on the inner face of the valve disk 10 and 11, instead of amere point or line of contact. The result of this peculiarity in theformation of the inclination is to secure steady, firm movement of thegate valves to their seats, and also a secure seating of the gate valvesagainst any tendency of the water to open them, such broad bearing inthe closed position of the gate valves also avoiding any tendency of thegate valve. to rock or tilt by reason of the pressure of the water inthe main, which might result. in leakage.

What: I claim is 1.. A gate valve mechanism comprising the combination,with a. pair of valves; ar ranged back to back. and movable edgewis'eacross and endwise to and from their seats, of a pair of arms arrangedon opposite sides of the valve centers, each arm being pivoted at oneend with the other end free, said. arms being movable bodily with thevalves in their edgewise movements and the free ends ofsaid' arms beingadapted to swing toward and from. each other substantially diametrically' of and between the rear faces of the valves, means for so swingingsaid arms as they move bodily with the valves, two pairs of opposedinclined members on the rear faces of the valves, two correspondinglyinclined members on the free end of each arm adapted to engage acorresponding pair of the inclined members on the; valves, said inclinedmembers on the valves and said inclined members on the arms beingadapted to coact to move the valves to their seats as the arms are swungon their pivots, the inclinations of said inclined members being sorelated to the pivotal points. of the arms that. in. all valve closingpositions of the latter a broad bearing engagement is secured betweenthe inclined members on the a ms and those.- on the valve, substantiallyas described.

2. A gate valve mechanism comprising the combination, with a pair ofvalves ar ranged back to back and movable edgewise across and endwise toand from their seats, of a pair of arms arranged on opposite sides ofthevalve centers, each. arm being pivoted at one end near the valveperipheries with its other end movable substantially diametrically ofand between the valves, said arms being movable bodily with the valves.in

ilig fld lfi d to. enact-to more the their seats as the arms are swungon their In testimony whereof, I have hereunto set pivots, theinclinations of said inclined my hand, in the presence of twosubscribing 10 members being so related to the pivotal Witnesses.

points of the arms that in all valve closing positions of the latter abroad bearing en- DENIS OBRIEN' gagement is secured between the inclinedWitnesses: members on thearms and those on the J. A. GRAVES, valves,substantially as described. W. H. KENNEDY.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0."

